Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety profile. The description adds a useful input constraint (section must be sourced from ninetofivemac_sections) and implies recency via 'current', but discloses nothing about pagination, result size, or freshness window.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

A single compact sentence with the resource front-loaded and the constraint trailing. No wasted words, though it could be slightly more minimal.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be described; the description covers the one required input and its provenance. For a single-parameter list tool this is nearly complete, missing only explicit sibling differentiation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the section property already enumerates all valid slugs, so the schema carries the parameter semantics. The description only reinforces the source-of-truth tool, which is a marginal add beyond structured data.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource (current 9to5Mac headlines) scoped to one public section, which an agent can act on directly. It does not, however, explicitly differentiate itself from the sibling ninetofivemac_news, so the boundary between 'headlines' and 'news' is left to inference.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The clause 'section must come from ninetofivemac_sections' gives a concrete prerequisite that routes the agent to the sections tool before calling this one. It stops short of stating when-not-to-use (e.g. versus ninetofivemac_news), but the operational context is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.